How to do request to user_timeline on local server?




I try to request for user_timeline but i don’t see any options for api key in docs, is see only
"Requires authentication? Yes"

I try to request in local server and without key i take cors error.

Or as an example, I would like to remove these paddings and set their sizes to pictures or videos, because I originally wanted to add all the tweets all the breadth on the center of the page.
Of course i may do all in js, but is not good choice i think.